externalMetadata
<h2>Metadata from the Internet</h2>
<p>When enabled, the system will search third-party services for 
additional metadata about the current song, such as album covers.</p>
<h2>What's shared?</h2>
<p>Track title, artist, album and system ID. No other information is sent.</p>
<h2>Which services are used?</h2>
<ul>
 <li>Last.fm (lookup only)</li>
 <li>MusicBrainz (HiFiBerry instance)</li>
 <li>Cover Art Archive</li>
 <li>Fanart.tv</li>
 <li>HiFiBerry MusicDB</li>
</ul>
